Java Big_ENDIAN implemettation to make udp datagram.

BigEndain.java

import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;

public class LabUnderGrad
{


    static HashMap<Integer,String> hashMap = new HashMap<>();
    static  String course_Info=null;
    static  String STOP_CONDITION ="no";
    static ArrayList<HashMap<Integer,String>> arrayList = new ArrayList<>();
    static int key;
    public  static  void main(String args[]) {
      Scanner scanner = new Scanner(System.in);
      hashMap.put(249, "Comp249");
      hashMap.put(248, "Comp461");
      hashMap.put(247, "comp467");
      hashMap.put(246, "comp460");
      hashMap.put(245, "comp465");
      //System.out.println("enter content");
     /*  while (true)
       {
           System.out.println("Enter course Info");
           course_Info = scanner.next();
           if (course_Info.equals(STOP_CONDITION))
           {
               break;
           }
           System.out.println("Enter key value");
           key = scanner.nextInt();
           hashMap.put(key,course_Info);

       }*/
       /* if (hashMap.containsKey(key))
         {
             System.out.println("Key is their "+ hashMap.get(key));
         }
         else
         {
             System.out.println("Key is not their ");
         }*/
     /*  System.out.println("HashMap Contents are here");
      for (Map.Entry m:hashMap.entrySet()
              ) {
          System.out.println(m.getKey()+" "+m.getValue());

      }
         arrayList.add(hashMap);
        System.out.println("Size is "+arrayList.size());*/
      //System.out.println("Hey its toString ");
      //  LabUnderGrad labUnderGrad = new LabUnderGrad();
      // System.out.println("Here is toString "+ labUnderGrad.toString());
      // System.out.println("Enter key to  Serach\n");
      // key = scanner.nextInt();
      //  search(key);
      /*if (ByteOrder.nativeOrder().equals(ByteOrder.nativeOrder())) {
          System.out.println("Order is " + ByteOrder.BIG_ENDIAN.toString());
      } else {
          System.out.println("Order is native");
      }*/
      //int to endian
      int SEQUENCE_NUMBER = 1;
      ByteBuffer byteBuffer = ByteBuffer.allocate(4);
      byteBuffer.order(ByteOrder.BIG_ENDIAN);
      byteBuffer.putInt(SEQUENCE_NUMBER);
      byte[] result = byteBuffer.array();
      System.out.println("Sequence number is :");
      for (int i = 0; i < result.length; i++) {
          System.out.print(" " + result[i]);
      }
      String SERVER_IP_ADDRESS = "192.168.2.3";
      System.out.println("\nServer ip is " + SERVER_IP_ADDRESS);
      String[] ipArray = SERVER_IP_ADDRESS.split("\\.");
      System.out.println("Ip broken into pieces " + ipArray.length);
      for (int i = 0; i < ipArray.length; i++) {
          System.out.print(" " + ipArray[i]);
      }
      int port = 8007;
      ByteBuffer byteBuffer1 = ByteBuffer.allocate(4);
      byteBuffer1.order(ByteOrder.BIG_ENDIAN);
      byteBuffer1.putInt(port);
      byte[] PORT_RESULT = byteBuffer1.array();
      System.out.println("\nPort number is : ");
      for (int i = 2; i < PORT_RESULT.length; i++)
      {
          System.out.print(" " + PORT_RESULT[i]);
      }

      String PAYLOAD = "Hi S";
      ByteBuffer byteBuffer3 = ByteBuffer.allocate(PAYLOAD.length());
      byteBuffer3.order(ByteOrder.BIG_ENDIAN);
      byte[] PAYLOAD_BYTES = PAYLOAD.getBytes();
      byteBuffer3.put(PAYLOAD_BYTES);
      byte[] PAYLOAD_BYTE_RESULT = byteBuffer3.array();
      System.out.println("\nPayload String is  : ");
      for (int i = 0; i < PAYLOAD_BYTE_RESULT.length; i++) {
          System.out.print (" " + PAYLOAD_BYTE_RESULT[i]);
      }
    //  char[] Payload_Data = PAYLOAD.toCharArray();
     // for (int i = 0; i < Payload_Data.length; i++) {
     //     System.out.println("numeric " + Character.getNumericValue(Payload_Data[i]));
     // }
     ///System.out.println("Bytes are here "+ PAYLOAD.getBytes().toString());
      //ByteBuffer byteBuffer2 = ByteBuffer.allocate(4);
  }
    @Override
    public String toString()
    {
        return "Key is "+hashMap.get(key);
    }
    private static void search(Integer key)
    {
        for(int i=0;i<arrayList.size();i++)
        {
            if(arrayList.get(i).get(key)!=null)
            {
                System.out.println("Value is " + arrayList.get(i).get(key).toString());
            }
        }
    }

}